DC - 6 GHz Connectors The 50 W MicroMate series connectors operate from DC to 6 GHz and feature the MMCX interface, which complies with the CECC22000 European specification. Various patterns, cable entries and adaptors can be selected. Ready-made cables can be purchased from the company or users can assemble the cable themselves. The new production technology features improved stamping and mold design to create a slightly lower connector profile, which allows for better PCB stackability and provides a guided entry for the connectors. The interface guarantees good mechanical and electrical performance up to 6 GHz. Amphenol Corp., Danbury, CT (203) 743-9272.

Broadband SP5T PIN Diode Switch The model 1802 SP5T PIN diode switch operates over the 300 MHz to 26 GHz frequency range. This solid-state, TTL-driven switch is designed to multiplex several signal sources into a common output. The unit's five input ports are broken into several frequency bands, including 0.3 to 4 GHz, 4 to 8 GHz, 8 to 14 GHz, 14 to 18 GHz and 18 to 26 GHz. The common output port has an instantaneous bandwidth of 300 MHz to 26 GHz. Custom frequency bands are available. The 50 W switch is equipped with SMA connectors and features an SWR over the entire band of less than 2.2 (max). Insertion loss ranges from 2.5 dB at the lowest frequencies to 4.5 dB at maximum frequencies. The unit switches in less than 50 ns and exhibits an on/off ratio of better than 40 dB. Size: 1.5" (octagonal) x 0.9". Weight: 3 oz.General Microwave Corp., Amityville, NY (516) 226-8900, ext. 291.

Laser Capacitors The MICROtune™ series 0805-size capacitors are used in automated functional RF tuning and are available in two tuning ranges: 10.0 to 1.2 pF and 6 to 1 pF. These surface-mount technology components exhibit minimum Q ratings of 75 and 300 at 200 MHz. Price: 35¢ (100,000). Delivery: stock to six weeks.Johanson Technology Inc., Camarillo, CA (805) 389-1166.

Medium-power Dry Loads The models 630, 640 and 650 high performance loads offer power ratings of 30, 40 and 50 W, respectively. All three models offer a frequency range of DC to 3 GHz with a maximum SWR of 1.2. Available connector types include BNC, N, SMA, TNC and 7-16.Microwave Devices Inc. Franklin, IN (317) 736-8833.

PCS Directional Couplers This directional coupler from the company's TELEPAC™ series operates over the 1700 to 2100 MHz frequency band and offers insertion loss of 0.2 dB (max), SWR of 1.29 (max) and directivity of 18 dB (min). Average power handling is 250 W CW. Coupling values are available in 6, 10, 20 and 30 dB. The coupler can be used in SWR sampling and power monitoring in telecommunications basestations. Size: 2.40" x 1.01" x 1.16".Sage Laboratories Inc., Natick, MA (508) 653-0844.

Four-line Data Line Chokes These four-line data line chokes provide a space-saving alternative to wired components in automotive engineering, industrial electronics, telephone systems, building services and automation. The units are designed for the S0 basic access and the S2M multiplex interfaces of integrated services digital network telephone systems. Models are available with asymmetrical attenuation up to 48 dB and rated inductances of 2 x 11 mH to 4.7 mH. The units operate over the –55° to +125°C temperature range. Siemens Matsushita Components, Munich, Germany (++49 911) 978-3321.

Terminal Blocks The 7600 series filtered terminal blocks eliminate electromagnetic interference (EMI) at a logical point in the circuit without increasing component count or adding solder connections. The blocks operate at 100 W V DC from –55° to 105°C and provide a capacitance range from 2500 to 5000 pF. The units offer an insertion loss of 50 dB at 100 MHz.Tusonix Inc., Tucson, AZ (520) 744-0400.

Gold-flashed SMT Terminations These gold-flashed terminations provided on size 1008 and 0805 coil components offer good electrical characteristics and are designed for multichip modules (MCM). Gold terminations reduce oxidation when utilized in hermetically sealed packages such as pacemakers or military applications. The ceramic core construction of these components offers high Q and SRF values. Delivery: stock to six weeks.UltraCoil Inc., San Diego, CA (619) 674-6686.

PCB Surface-mountable Solid-state Relay The model LR1200480D40 DC-controlled AC solid-state relay is capable of controlling up to 40 A at a line voltage of 480 V AC. The unit features zero voltage turn-on through back-to-back SCR output switches capable of 1200 Vpk transients, a logic-compatible control and 4000 V RMS isolation between the input and output. The relay is available in different voltage and current ratings ranging from 240 to 480 V AC and from 25 to 40 A. The unit can be purchased in three control types: AC input, DC input and random turn-on DC control. The unit is housed in a high grade stable plastic package ensuring protection of the internal circuitry. Size: 1.4" x 1.12". Price: $14.60 (500). Delivery: stock to eight weeks.Teledyne Relays, Scottsdale, AZ (602) 443-1288.

Miniature/Subminiature Profile Resonators and Inductors These ceramic coaxial line resonators and inductors designed for low frequency applications are available in four different dielectric constants to operate from 300 MHz to 3 GHz. For low frequency applications (300 MHz), lengths of up to one inch in 2 and 3 mm square outside dimensions are offered. The units can be specified as resonators or inductors depending on requirements. Dielectric constants available include 10, 20, 38 and 90.Trans-Tech, a subsidiary of Alpha Industries, Adamstown, MD (301) 695-9400.

RF Connectors The QDS series RF connectors with type C and SC interfaces feature a quick connect/dis-connect design employing a spring-loaded sleeve on the male member that draws back to let three self-contained balls seat into a mating groove on the female and then slide forward. This positive locking mechanism eliminates cross threading and is easy to install. Configurations include plugs, jacks, receptacles and between-series adapters.Tru-Connector Corp., Peabody, MA (508) 532-0775.

LMDS MMIC Package This high frequency MMIC package designed for use in local multipoint distribution system (LMDS) applications features an insertion loss of less than 0.5 dB and a return loss of better than 15 dB in the 25 to 30 GHz frequency range. The 0.285" x 0.285" package has two RF ports and eight DC ports. The package features a cavity size of 125 x 70 mils and can incorporate the majority of low noise MMIC amplifiers on the market.PmT – princeton microwave, Mercerville, NJ (609) 586-8140.

Chip Inverters The DUREL® series model D358 electroluminescent (EL) driver developed by Durel Corp. is tailored specifically to power larger EL displays used in cellular telephones, personal digital assistants, databanks and global positioning handsets. Matching the IC inverter with standard DUREL EL lamp construction provides a system that uses very low battery power to backlight a relatively large liquid crystal display and membrane keypad area. The inverter requires only one inductor and one capacitor. The inverters consist of a family of switch-mode, surface-mountable IC DC-AC drivers. The patented drivers have microprocessor interfaces that enable both power-down and dimming features.Rogers Corp., Rogers, CT (860) 774-9605.

Ultraminiature Surface-mount Trimmer Capacitors The JS series ultraminiature trimmer capacitors measure 2.8 x 2.2 x 1.0 mm and maintain the good stability of the larger JZ and JR series trimmers. Two ranges are available: 3 to 10 pF and 4.5 to 20 pF. Q is more than 2000 at 10 MHz. The units are available as panel surface, printed circuit or strip line mount. Voltronics Corp., Denville, NJ (973) 586-8585.

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